【精品】毕业设计：基于单片机的液位控制系统设计.doc

基于单片机的液位控制系统的设计 摘 要 液位测量广泛应用于工业、经济、生活等领域。本设计以水供水为模型测量监控记录 The Design of Liquid Level Control System Based on MCU Abstract The liquid level measurement is widely used in industry, economy, life and other fields. This design take the water tank water supply as a model, uses in carries on the survey to the water tank fluid position signal to monitor the record. The liquid level measurement device base on MCU is widely used because of many characteristics such as high measurement accuracy, good repeatability, low power consumption and long useful time. When we study Scientific Outlook on Development thoroughly, the design of electronic aid should include the thought of sustainable development. So, beyond the liquid level measurement device based on MCU, expand the functions of real-time monitoring, data acquisition, serial communication. Through the new functions, the scientific method of the liquid level measurement could be combined with Statistical Science, be used to manage the water resources reasonable, reduce energy consumption. This thesis introduces the design process of the liquid level control system by several parts as system schema, the design of hardware circuit, the software of host computer and system software, ultimately achieved the level of real-time measurement and monitoring. Finally, the paper summarizes the problems and solutions of the design process, describes briefly the method of data processing, and leads to ideas of the further design and development. Keywords：MCU；Liquid Level Measurement；Real-time monitoring；Serial Communication  目 录 引言 1 第1章 绪论 2 1.1 课题背景与研究意义 2 1.2 国内外研究现状及发展 2 1.3 本课题主要研究内容 3 第2章 系统总体方案 4 2.1 系统设计要求 4 2.2 系统框图 4 2.3 硬件设计方案 4 2.3.1 主控模块设计方案 5 2.3.2 键盘模块设计方案 5 2.3.3 显示模块设计方案 6 2.3.4 数据存储模块设计方案 6 2.3.5 时间模块设计方案 7 2.3.6 A/D转换模块设计方案 8 2.3.7 通信模块设计方案 9 2.3.8 电机控制模块设计方案 10 第3章 硬件电路设计 11 3.1 AT89S52硬件设计 11 3.2 按键设计 13 3.3 显示单元硬件设计 14 3.4 存储单元硬件设计 15 3.5 时间单元硬件设计 17 3.6 A/D转换单元硬件设计 18 3.7 通信单元硬件设计